/* Dossier — Learn pages (walkthroughs)
 * Shared layout for the overview + per-scenario walkthrough pages.
 * Page-specific accent tone is set via --track-accent (gold for app, blue
 * for portal) on the <body data-track="..."> attribute.
 */

/* ── Tracks (Ch13 portal vs Ch7 app) ─────────────────── */
:root {
  --track-app:    var(--ds-brand-primary);   /* gold */
  --track-app-2:  var(--ds-brand-accent);
  --track-portal: #5B7FA6;                   /* blue */
  --track-portal-2: #6E92B8;
}
body[data-track="app"]    { --track-accent: var(--track-app);    --track-accent-2: var(--track-app-2); }
body[data-track="portal"] { --track-accent: var(--track-portal); --track-accent-2: var(--track-portal-2); }
body:not([data-track])    { --track-accent: var(--ds-brand-primary); --track-accent-2: var(--ds-brand-accent); }

/* ── Scroll progress bar (top) ───────────────────────── */
.scroll-bar {
  position: fixed; top: 0; left: 0; right: 0;
  height: 2px; z-index: 300;
  background: linear-gradient(90deg, var(--track-accent), var(--track-accent-2));
  transform: scaleX(0); transform-origin: 0 0;
  transition: transform 80ms linear;
  pointer-events: none;
}

/* ── Layout shell ────────────────────────────────────── */
.learn-shell {
  display: grid;
  grid-template-columns: 200px minmax(0, 760px);
  gap: 64px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 110px 32px 140px;
}
@media (max-width: 900px) {
  .learn-shell { grid-template-columns: 1fr; gap: 0; padding-top: 90px; }
  .learn-rail { display: none; }
}

/* ── Sticky side rail (timeline) ─────────────────────── */
.learn-rail {
  position: sticky; top: 90px; align-self: start;
  font-size: 11px; color: var(--text-tertiary);
}
.rail-eyebrow {
  font-size: 10px; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--track-accent);
  margin-bottom: 14px;
}
.rail-title {
  font-family: var(--ds-font-display);
  font-size: 17px; line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 22px; font-weight: 500;
  letter-spacing: -0.01em;
}
.rail-meta {
  font-size: 11px; color: var(--text-tertiary);
  display: flex; gap: 10px; margin-bottom: 24px;
}
.rail-meta span { display: flex; align-items: center; gap: 5px; }
.rail-meta strong { color: var(--text-secondary); font-weight: 500; }
.rail-steps { list-style: none; border-left: 1px solid var(--border-subtle); }
.rail-steps li { position: relative; padding: 6px 0 6px 18px; line-height: 1.4; }
.rail-steps li::before {
  content: ""; position: absolute; left: -3px; top: 11px;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--border-strong);
}
.rail-steps li.active::before { background: var(--track-accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--track-accent) 22%, transparent); }
.rail-steps li.active { color: var(--text-primary); }
.rail-steps a { color: inherit; text-decoration: none; }
.rail-steps a:hover { color: var(--text-secondary); }

/* ── Hero ────────────────────────────────────────────── */
.learn-hero { margin-bottom: 48px; }
.learn-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; font-weight: 500; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--track-accent);
  padding: 4px 10px; border-radius: 12px;
  background: color-mix(in srgb, var(--track-accent) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--track-accent) 24%, transparent);
  margin-bottom: 16px;
}
.learn-tag .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--track-accent); }

.learn-hero h1 {
  font-family: var(--ds-font-display);
  font-size: 44px; line-height: 1.08; letter-spacing: -0.025em;
  font-weight: 400; margin-bottom: 16px;
}
.learn-hero h1 em { font-style: italic; color: var(--track-accent); font-weight: 400; }
.learn-hero .deck {
  font-size: 16px; line-height: 1.72; color: var(--text-secondary);
  max-width: 620px;
}

/* ── Steps ───────────────────────────────────────────── */
.step {
  position: relative;
  padding: 48px 0;
  border-top: 1px solid var(--border-subtle);
}
.step:first-of-type { border-top: 0; padding-top: 24px; }
.step-head {
  display: flex; align-items: baseline; gap: 14px;
  margin-bottom: 6px;
}
.step-num {
  font-family: var(--ds-font-mono);
  font-size: 11px; font-weight: 500;
  color: var(--track-accent);
  letter-spacing: 0.08em;
}
.step-time {
  font-family: var(--ds-font-mono);
  font-size: 10px; color: var(--text-tertiary);
  margin-left: auto;
}
.step h2 {
  font-family: var(--ds-font-display);
  font-size: 26px; line-height: 1.2; letter-spacing: -0.018em;
  font-weight: 500; margin-bottom: 12px;
}
.step .lede {
  font-size: 14px; line-height: 1.72; color: var(--text-secondary);
  margin-bottom: 22px;
}
.step .lede strong { color: var(--text-primary); font-weight: 600; }

/* ── Screenshot frame ─────────────────────────────────── */
.shot {
  position: relative;
  border-radius: var(--ds-radius-lg);
  border: 1px solid var(--border-default);
  background: var(--bg-raised);
  overflow: hidden;
  box-shadow:
    0 1px 1px color-mix(in srgb, black 20%, transparent),
    0 6px 14px color-mix(in srgb, black 22%, transparent),
    0 22px 36px color-mix(in srgb, black 18%, transparent);
}
.shot img { display: block; width: 100%; height: auto; }
.shot a { display: block; cursor: zoom-in; text-decoration: none; }
.shot a:hover { filter: brightness(1.02); }
.shot .open-hint {
  position: absolute;
  top: 10px; right: 12px;
  font-size: 10px; letter-spacing: 0.08em;
  font-family: var(--ds-font-mono);
  text-transform: uppercase;
  padding: 4px 8px;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  border-radius: 3px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
}
.shot:hover .open-hint { opacity: 1; }
.shot.placeholder {
  aspect-ratio: 16 / 10;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-tertiary); font-size: 12px;
  background:
    repeating-linear-gradient(
      45deg,
      color-mix(in srgb, var(--track-accent) 4%, transparent) 0 12px,
      transparent 12px 24px
    ),
    var(--bg-raised);
}
.shot.placeholder .ph-inner {
  text-align: center;
  font-family: var(--ds-font-mono);
  font-size: 11px; letter-spacing: 0.05em;
  color: var(--text-tertiary);
}
.shot.placeholder .ph-inner b {
  display: block; color: var(--text-secondary);
  font-weight: 500; margin-bottom: 4px; font-size: 12px;
}

.shot-caption {
  margin-top: 12px;
  font-size: 12px; line-height: 1.6;
  color: var(--text-tertiary);
  font-style: italic;
}

/* ── Highlight (key moment) ──────────────────────────── */
.highlight {
  display: flex; gap: 14px;
  padding: 18px 20px;
  margin: 22px 0;
  border-radius: var(--ds-radius-md);
  border: 1px solid color-mix(in srgb, var(--track-accent) 30%, transparent);
  background: color-mix(in srgb, var(--track-accent) 6%, transparent);
}
.highlight .icon {
  flex-shrink: 0; width: 22px; height: 22px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  background: var(--track-accent); color: var(--bg);
  font-weight: 700; font-size: 12px;
}
.highlight .body { font-size: 13px; line-height: 1.65; color: var(--text-primary); }
.highlight .body b { color: var(--track-accent); font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; font-size: 11px; display: inline-block; margin-right: 6px; }

/* ── Scenario chooser (overview page) ────────────────── */
.scenarios { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 36px 0 48px; }
@media (max-width: 760px) { .scenarios { grid-template-columns: 1fr; } }

.scenario {
  position: relative;
  padding: 28px 26px;
  border-radius: var(--ds-radius-lg);
  border: 1px solid var(--border-default);
  background: var(--bg-raised);
  text-decoration: none;
  color: inherit;
  display: flex; flex-direction: column; gap: 12px;
  transition: border-color 0.2s, transform 0.2s;
  overflow: hidden;
}
.scenario:hover { border-color: var(--track-accent-c, var(--border-strong)); transform: translateY(-2px); }
.scenario::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--track-accent-c, var(--text-tertiary));
}
.scenario[data-track="portal"] { --track-accent-c: var(--track-portal); }
.scenario[data-track="app"]    { --track-accent-c: var(--track-app); }

.scenario-eyebrow { font-size: 10px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--track-accent-c); }
.scenario h3 { font-family: var(--ds-font-display); font-size: 22px; font-weight: 500; letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 4px; }
.scenario p { font-size: 13px; line-height: 1.65; color: var(--text-secondary); }
.scenario .meta {
  margin-top: auto; padding-top: 12px;
  display: flex; gap: 18px; font-size: 11px; color: var(--text-tertiary);
  border-top: 1px solid var(--border-subtle);
}
.scenario .meta strong { font-weight: 500; color: var(--text-secondary); }
.scenario .meta .go { margin-left: auto; color: var(--track-accent-c); font-weight: 500; }

/* ── End CTA ─────────────────────────────────────────── */
.end-cta {
  margin-top: 64px; padding: 36px 30px;
  border-radius: var(--ds-radius-lg);
  border: 1px solid var(--border-default);
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--track-accent) 6%, var(--bg-raised)),
    var(--bg-raised));
  text-align: center;
}
.end-cta h3 { font-family: var(--ds-font-display); font-size: 24px; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 10px; }
.end-cta p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; max-width: 480px; margin: 0 auto 22px; }
.end-cta-buttons { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.end-cta a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; border-radius: 8px;
  font-size: 13px; font-weight: 500; text-decoration: none;
  transition: all 0.15s;
}
.end-cta a.primary { background: var(--track-accent); color: #FFF; }
.end-cta a.primary:hover { background: var(--track-accent-2); }
.end-cta a.secondary { background: transparent; color: var(--text-primary); border: 1px solid var(--border-strong); }
.end-cta a.secondary:hover { border-color: var(--track-accent); color: var(--track-accent); }

/* ── Inline pill ─────────────────────────────────────── */
.pill {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--ds-font-mono);
  background: color-mix(in srgb, var(--track-accent) 12%, transparent);
  color: var(--track-accent);
  border: 1px solid color-mix(in srgb, var(--track-accent) 24%, transparent);
}
